oh no! hopefully one day you'll be able to figure it out D:
i'm in google chrome and using a macbook pro. i tried to do some testing for the bug and this is what i've found out. if i don't load a save at all through the entire playthrough then I keep the frost magic the entire time (i checked character stats every few choices). however, if i at all load a save the magic resets to flame immediately. i spent a hot second seeing if it would stay frost if i got through plot points where your type of magic is tallked about like siruud telling mc that they can feel their magic, the battle with bright, after telling siruud about the battle with bright and mc thinking back to the magic they felt, and then i tried one last time at the complete end of the playthrough and all of them switched back to flame magic. i then tried this for blight and could not recreate the bug. additionally while doing that i found out that if you do runs with two separate mc names, that the names for all the saves change to the name of the mc you are currently playing.